LED点阵书写显示屏的设计  

Design of LED Dot Matrix Writing Display Screen

作　　者：王皑[1] 佘丹妮[2] 

机构地区：[1]湖南工业职业技术学院,湖南长沙410208 [2]东华大学,上海201620

出　　处：《现代电子技术》2011年第19期201-204,共4页Modern Electronics Technique

摘　　要：LED显示屏的设计硬件主要由STC89C58单片机最小系统、32×32的双色点阵显示阵列、光笔、按键、液晶显示屏等组成。双色点阵中的红色LED始终工作在微亮的扫描状态,STC89C58单片机利用自制的光笔中红外光电三极管检测光笔触及位置处红色LED灯的点亮,计算出光笔位置的行列坐标,并根据按键设置的不同工作模式控制LED显示,从而实现点亮、划亮、反显、清屏、笔画拖动、轮流显示等功能。显示屏能根据环境光强自动调节显示屏的显示亮度,当在设定时间内光笔未接触显示屏或按键未按下时关闭所有显示,并使系统进入休眠状态,减少电能消耗,当有按键按下时系统恢复运行。The hardware of this design is consisted of minimum system of STC89C58 MCU,32 x 32 double-color dot matrix display array,light pen,buttons,LCD etc.The red LED in double color dot matrix is always working in slightly bright scanning state.STC89C58 MCU uses the infrared light electric triode of the self-made pen to detect where the red pen is touching and whether the LED lamp lights in that position is on or off.It calculates the coordinate of the pen and control the condition of LED according to the different working modes which are controlled by the buttons,so as to realize functions such as the light,scratched,reverse,screen clearing,stroke drag and display in turn.The screen can automatically adjust the screen brightness according to environmental light.If the screen is not contacted or the buttons are not pressed during the setting time,it would close all show and make the system into dormant to reduce electricity consumption.Pressing the button,the system would recover.

关 键 词：STC89C58 LED双色点阵 红外光电三极管光笔 

分 类 号：TN873-34[电子电信—信息与通信工程]